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PLC-5 System Overview
Product Design
PLC-5 processors are available in a range of forcible I/O (512 maximum through 3072 maximum) and maximum user memory (6K through 100K words). All are capable of controlling remotely located I/O. The maximum number of I/O locations remote from the processor ranges from 5 through 125. The processor can monitor/control these I/O across ControlNet, DeviceNet, and Remote I/O links.
The 1771 platform provides a rack-based modular assembly. The PLC-5 processors are single-slot modules that are placed into the left-most slot of a 1771 I/O chassis. For 1771 I/O in a location remote from the processor, the I/O adapter is a single-slot module that is placed into the left-most slot of a 1771 I/O chassis. Some 1771 I/O chassis are built for back-panel mounting and some are built for rack mounting. The 1771 I/O chassis is available in sizes of 1, 2, 4, 8, 12, or 16 I/O module slots. The 1771 I/O modules are available in densities of a maximum of 32 I/O per module. Mechanical keying of each I/O module to its backplane connector guards against inadvertently replacing a module with another module of a different type. Because external connections are terminated at a wiring arm that unplugs from the module, there is no need to disconnect wiring to replace an I/O module.
Power supply modules are available for installation in I/O module slots. Also stand-alone power supplies are available and can be mounted separately or directly on the left end of the 1771 I/O chassis.